Even the much lower average was high enough to eclipse the record set byBugatti's Veyron 16.4 Super Sport in 2010, itself a blistering 431 km/h (268 mph).

Just last month, the vehicle was also in the record books after Lilja drove from a standstill to 249mph and back to a full stop in just over 36 seconds - beating the Bugatti Chiron's 41.96-second time that had been set by former F1 driver Juan-Pablo Montoya. The above video shows just that and features Koenigsegg factory driver Niklas Lilja hitting almost 300 miles per hour.

Koenigsegg Agera RS test driver spoke of how while he wasn't apprehensive, he did worry a little about one of the tyres bursting along the way. The average speed achieved, measuring runs in both directions, was 447.0 km/h (277.9 mph).

To hit these incredible speeds, the Agera RS is built using a lightweight carbon fiber body and an aluminum honeycomb monocoque structure.

Racelogic uploaded a video of the successful world record attempt, taken by the VBOX HD2 inside the cockpit of the Koenigsegg Agera RS.

Allowing the Agera RS to reach such a ludicrous speed is a 5.0-litre twin-turbocharged V8 produced in-house by Koenigsegg, pumping out 1380bhp and 1280 Nm of torque.

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